“That’s got to worry about everybody because it’s a sign that there are problems,” Russianoff told WCBS 880’s Rich Lamb. “There were a lot of mechanical problems, a lot of signaling problems, switches as well.”

An MTA spokesman, however, responded to the report saying its customers are not waiting longer for trains; the agency is just doing a better job of communicating about problems.

“We agree that the service alerts are a powerful tool that deliver meaningful information to customers,” the spokesman said. “We have increased staff and have become more efficient in providing service information in a more timely manner so customers are quickly aware of any incidents that may impact their commute. However, the cause of such incidents can quickly change upon further investigation which is why the alerts were never meant to serve as a performance metric.”

According to the report, the F train had the highest number of delays, with the No. 4 line coming in second.

The number of alerts about L-train delays skyrocketed by 91 percent from 2011 to 2013, the report said.

The J/Z train was delayed the least in 2013, according to the alerts.

The report did not weigh 2012 data because it said Superstorm Sandy created an “aberration.” It counted only delays of eight minutes or more that were deemed “controllable” — for example, police activity and rider illnesses were not weighed.